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Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2865
2016 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, no 2, 87Article in journal (Refereed) Published
Abstract [en]

This paper reports inclusive and differential measurements of the t (t) over bar charge asymmetry A(C) in 20.3 fb(-1) of root s = 8 TeV pp collisions recorded by the ATLAS experiment at the Large Hadron Collider at CERN. Three differential measurements are performed as a function of the invariant mass, transverse momentum and longitudinal boost of the t (t) over bar system. The t (t) over bar pairs are selected in the single-lepton channels (e or mu) with at least four jets, and a likelihood fit is used to reconstruct the t (t) over bar event kinematics. A Bayesian unfolding procedure is performed to infer the asymmetry at parton level from the observed data distribution. The inclusive t (t) over bar charge asymmetry is measured to be A(C) = 0.009 +/- 0.005 (stat. + syst.). The inclusive and differential measurements are compatible with the values predicted by the Standard Model.

Place, publisher, year, edition, pages
Springer-Verlag New York, 2016. Vol. 76, no 2, 87
Keyword [en]
Proton-Proton Collisions, Hadronic Collisions, Matrix-Elements, Monte-Carlo, Resummation, Colliders, Lhc
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-185541DOI: 10.1140/epjc/s10052-016-3910-6ISI: 000372877800002Scopus ID: 2-s2.0-85010218965OAI: oai:DiVA.org:kth-185541DiVA: diva2:921936
Note

QC 20160421

Available from: 2016-04-21 Created: 2016-04-21 Last updated: 2017-02-16Bibliographically approved

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